Heel portion of a ski binding



FIG. 1 is a top, front, and left-side perspective view of a heel portion of a ski binding, showing our new design.

FIG. 2 is a top plan view thereof.

FIG. 3 is a bottom plan view thereof.

FIG. 4 is a front elevation view thereof.

FIG. 5 is a left-side elevation view thereof, and the right side elevation view being a mirror image thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken line portions of FIG. 3 are included to show unclaimed subject matter only and form no part of the claimed design 

CLAIM The ornamental design for a heel portion of a ski binding, as shown and described. 